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Finding the Fourth Proportional to 85,681.52, 128,501.58 and 33,057.44

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Solution

The fourth proportional to 85,681.52, 128,501.58 and 33,057.44 is: 49,578.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,681.52 : 128,501.58 = 33,057.44 : x
  2. Step 2: Convert to fraction form
    85,681.52/128,501.58 = 33,057.44/x
  3. Step 3: Cross multiply
    85,681.52x = 128,501.58 × 33,057.44
  4. Step 4: Simplify right side
    85,681.52x = 4,247,933,270.76
  5. Step 5: Solve for x
    x = 4,247,933,270.76/85,681.52
  6. Step 6: Final answer
    x = 49,578.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.